CN103950085A - Method for establishing moisture content gradient of shaving board - Google Patents
Method for establishing moisture content gradient of shaving board Download PDFInfo
- Publication number
- CN103950085A CN103950085A CN201310336351.5A CN201310336351A CN103950085A CN 103950085 A CN103950085 A CN 103950085A CN 201310336351 A CN201310336351 A CN 201310336351A CN 103950085 A CN103950085 A CN 103950085A
- Authority
- CN
- China
- Prior art keywords
- wood shavings
- moisture content
- top layer
- glue mixing
- moisture
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000001035 drying Methods 0.000 claims abstract description 30
- 239000003292 glue Substances 0.000 claims abstract description 27
- 239000012792 core layer Substances 0.000 claims abstract description 4
- 239000010410 layer Substances 0.000 claims description 67
- 239000002023 wood Substances 0.000 claims description 61
- 239000002245 particle Substances 0.000 claims description 19
- 230000015572 biosynthetic process Effects 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- 238000003892 spreading Methods 0.000 claims description 6
- 238000010276 construction Methods 0.000 claims description 5
- 230000013011 mating Effects 0.000 claims description 4
- 210000002615 epidermis Anatomy 0.000 claims description 2
- 238000007731 hot pressing Methods 0.000 abstract description 11
- 230000000694 effects Effects 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004904 shortening Methods 0.000 abstract description 2
- 238000005452 bending Methods 0.000 abstract 1
- 230000003068 static effect Effects 0.000 abstract 1
- 239000002344 surface layer Substances 0.000 abstract 1
- 239000011347 resin Substances 0.000 description 8
- 229920005989 resin Polymers 0.000 description 8
- 238000005265 energy consumption Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Dry Formation Of Fiberboard And The Like (AREA)
Abstract
The invention discloses a method for establishing a moisture content gradient of a shaving board. The method consists of three technological links, namely drying in levels, respective glue mixing and respective paving. The drying in levels is characterized in that two levels of drying systems are established and a shaving sorting procedure is set up between the first-level drying system and the second-level drying system; the shavings subjected to drying in levels are respectively stored, metered and mixed with glue, and the moisture content difference between shavings in a core layer and shavings on a surface layer are stabilized; after the shavings are metered, the shavings are respectively paved, and the moisture content gradient is finally established on a cross section of a blank of the shaving board. By the moisture content gradient, the moisture on the surface of the blank is quickly vaporized in the heating process, a steam impact effect is generated, the heat transfer speed is improved, the temperature rise speed of the core layer is improved and the aims of shortening hot-pressing time and improving hot-pressing efficiency are finally fulfilled; in addition, by establishing the moisture content gradient of the blank, the performance and the surface quality of the finished shaving board can be obviously improved, the static bending intensity of the board is improved, the made shaving board is more smooth in surface, and the sanding loss of the shaving board is reduced.
Description
Technical field
The present invention relates to a kind of particieboard moisture gradient construction method, the method is mainly used in particieboard and produces, and belongs to wood processing technique field.
Background technology
Hot pressing is most important process procedure during particieboard is produced, and Main Function comprises two aspects: (1) is compressed to appointed thickness by slab; (2) promote resin solidification to form bonding strength.Wherein, be the Main Basis that determines particieboard pressing cycle the hardening time of resin, thereby also determined Flakeboard Product Line efficiency.In particieboard is produced, resin is realized curing at a certain temperature, and because particle mat sandwich layer is later than top layer, to reach resin solidification temperature required, so hot pressing time depends primarily on the programming rate of particieboard sandwich layer.The measure of accelerating sandwich layer programming rate will be conducive to the shortening of particieboard hot pressing time, and the moisture content that improves particle mat top layer is one of effective ways that shorten hot pressing time.If slab top layer has compared with high-moisture percentage, slab top layer will form more water vapour at short notice, because the thermal conductivity factor of water is high compared with air, produce steam impringement effect, accelerate heat transfer rate, improve sandwich layer programming rate, finally reach the object that shortens hot pressing time, improves hot pressing efficiency.
In addition, the moisture content that improves particieboard top layer also has remarkable impact to the final mass of product, concrete impact is mainly manifested in following several aspect: the raising of (1) top layer wood shavings moisture content will contribute to wood plasdcizing, be convenient to press closes, and sheet metal thickness is easy to control; (2) the higher moisture content in top layer can effectively reduce the generation of top layer precuring phenomenon, is conducive to reduce the sanding surplus of particieboard, reduces the production cost of particieboard; (3) top layer moisture content is high, and pressed sheet surface is more smooth, has more excellent surface quality.
At present, the method for raising particle mat top layer moisture content mainly contains two kinds: (1) adds water in top layer wood shavings glue mixing process, comprises the methods such as letdown resin concentration; (2) surface spray is steamed, and utilizes the spray on heating platen to steam structure to steel slab surface uperize.These two kinds of methods have all obtained application in suitability for industrialized production, but owing to being to add water or humidification for the wood shavings of drying, therefore, have in fact the defect of waste energy consumption for drying.
Particle mat top layer wood shavings and sandwich layer wood shavings have different shaving shapes, and conventionally top layer wood shavings are compared with thin and sandwich layer wood shavings are relatively thick.Shaving shape on rate of drying impact significantly, because Water In Wood is mainly by surface evaporation, therefore, just become to affect the key of rate of drying with moisture diffusion resistance and the closely-related wood shavings thickness of distance, wood shavings are thicker, and drying time is longer, and under same drying condition, large scale wood shavings often need more to grow drying time, consume more multipotency consumption.At present, wood shavings are mostly simultaneously dry, the size dimension of wood shavings do not distinguished, and the method not only energy consumption is high, and is unfavorable for improving the dry mass of wood shavings.
Summary of the invention
The object of the invention is for above-mentioned deficiency, a kind of particle mat moisture gradient construction method is provided.Take particle drying as starting point, guarantee the moisture gradient of particieboard core top layer wood shavings, shorten particieboard hot pressing time, improve particieboard production efficiency.
The present invention is for building particle mat moisture gradient, and specifically, respectively glue mixing dry by classification, three process procedures of mating formation are realized respectively:
(1) classification is dry.Set up secondary drying system, and between firsts and seconds drying system, set up wood shavings sorting operation, the tiny sandwich layer wood shavings that are dried to water content requirement are separated, and thicker sandwich layer wood shavings enter into secondary drying system.By classification, be dried, control core top layer wood shavings moisture content difference more than 4%, its center core layer wood shavings moisture control is between 2 ~ 6%, and top layer wood shavings moisture control is between 6 ~ 10%.
(2) glue mixing respectively.The dried wood shavings of classification store respectively, and glue mixing respectively after metering, by glue mixing respectively, stablizes core top layer wood shavings moisture content difference.In glue mixing process, at least use two glue mixers, after glue mixing sandwich layer wood shavings moisture control between 6 ~ 12%, top layer wood shavings moisture control between 8 ~ 14%, finally control glue mixing after core top layer wood shavings moisture content difference more than 2%.
(3) mat formation respectively.Wood shavings after glue mixing store respectively respectively, after metering, mat formation respectively, pavement process is at least used three or three above spreading heads, and control particle mat core top layer wood shavings moisture content difference between 2 ~ 4%, wherein slab sandwich layer moisture control is between 7 ~ 11%, and slab top layer moisture control is between 10 ~ 14%.
Drying system of the present invention is used roller dryer, and roller rotating speed is per minute 6 ~ 20 to turn.
Tiny sandwich layer wood shavings of the present invention, is characterized in that shaving shape is: thickness is below 0.2 millimeter, and width is below 1 millimeter, and length is below 5 millimeters.
Particle mat of the present invention, is characterized in that upper epidermis, sandwich layer, lower top layer, consisting of respectively, and wherein upper and lower two surface structures are identical, symmetrical existence, and upper and lower two top layer pavement thicknesses account for 40 ~ 60% of gross thickness simultaneously.
Particle mat of the present invention, can be oriented structure, can be also random structure.
The innovation of a kind of particieboard moisture gradient construction method that the present invention proposes is: from particle drying, build the moisture gradient of particieboard.
The invention has the advantages that:
(1) set up classification drying system, save energy consumption for drying, guarantee dry mass.
(2) guarantee the moisture gradient of particle mat table, sandwich layer, accelerate heat transfer rate, shorten hot pressing time, improve hot pressing efficiency.
(3) guarantee the moisture gradient of particle mat table, sandwich layer, significantly improve particieboard finished product plate property and surface quality, wherein sheet material MOR increases, and surface is more smooth simultaneously, is conducive to reduce sanding loss.
The specific embodiment
Following specific embodiment is to further illustrate of the present invention, rather than limits the scope of the invention.
Embodiment 1:
(1) particle drying: control one-level dry in the roller rotating speed of roller dryer be per minute 8 to turn, after dry, wood shavings average moisture content is 7%, the wood shavings of one-level drying machine are carried out to sorting, tiny top layer wood shavings are directly delivered to the dry wood shavings feed bin in top layer, thick sandwich layer wood shavings enter secondary drying, after secondary drying, wood shavings average moisture content is 3%, is delivered to the dry wood shavings feed bin of sandwich layer after sorting.
(2) wood shavings glue mixing: the wood shavings of metering mix with the resin adhesive of metering, different glue mixers is separately measured and enters respectively on its SMIS top layer.The resin added of sandwich layer wood shavings is 9%, through the sandwich layer wood shavings moisture content of glue mixing, is 9%, and the resin added of top layer wood shavings is 12%, through the top layer of glue mixing wood shavings moisture content, is 12%.Core top layer wood shavings after glue mixing are delivered to respectively core top layer wood shavings feed bin and prepare to mat formation.
(3) plate blank paving: use four spreading machines, wherein a spreading machine is respectively used on upper and lower two top layers, remains two spreading machines sandwich layer of mating formation.Glue mixing wood shavings through measuring enter spreading machine mats formation, the slab after mating formation, and sandwich layer average moisture content is 9%, top layer average moisture content is 11%.
Claims (6)
1. a particle mat moisture gradient construction method, is characterized in that, respectively glue mixing dry by classification, three process procedures of mating formation form respectively:
A. classification is dry: set up secondary drying system, and between firsts and seconds drying system, set up wood shavings sorting operation, the tiny sandwich layer wood shavings that are dried to water content requirement are separated, and thicker sandwich layer wood shavings enter into secondary drying system; By classification, be dried, control core top layer wood shavings moisture content difference more than 4%, its center core layer wood shavings moisture control is between 2 ~ 6%, and top layer wood shavings moisture control is between 6 ~ 10%;
B. glue mixing respectively: the dried wood shavings of classification store respectively, glue mixing respectively after metering, by glue mixing respectively, stablizes core top layer wood shavings moisture content difference; In glue mixing process, at least use two glue mixers, after glue mixing sandwich layer wood shavings moisture control between 6 ~ 12%, top layer wood shavings moisture control between 8 ~ 14%, finally control glue mixing after core top layer wood shavings moisture content difference more than 2%;
C. mat formation respectively: the wood shavings after glue mixing store respectively respectively, after metering, mat formation respectively, pavement process is at least used three or three above spreading heads, and control particle mat core top layer wood shavings moisture content difference between 2 ~ 4%, wherein slab sandwich layer moisture control is between 7 ~ 11%, and slab top layer moisture control is between 10 ~ 14%.
2. according to the particle drying described in claim 1.a, it is characterized in that described drying system is used roller dryer.
3. according to the tiny sandwich layer wood shavings described in claim 1.a, it is characterized in that shaving shape is: thickness is below 0.2 millimeter, and width is below 1 millimeter, and length is below 5 millimeters.
4. according to the particle mat described in claim 1.c, it is characterized in that upper epidermis, sandwich layer, lower top layer, consisting of respectively, wherein upper and lower two surface structures are identical, symmetrical existence, and upper and lower two top layer pavement thicknesses account for 40 ~ 60% of gross thickness simultaneously.
5. according to the particle mat described in claim 1.c, it is characterized in that it can being oriented structure, can be also random structure.
6. according to the roller dryer described in claim 2, it is characterized in that roller rotating speed is per minute 6 ~ 20 to turn.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336351.5A CN103950085B (en) | 2013-08-05 | 2013-08-05 | A kind of particieboard moisture gradient construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310336351.5A CN103950085B (en) | 2013-08-05 | 2013-08-05 | A kind of particieboard moisture gradient construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103950085A true CN103950085A (en) | 2014-07-30 |
| CN103950085B CN103950085B (en) | 2016-06-22 |
Family
ID=51327505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310336351.5A Expired - Fee Related CN103950085B (en) | 2013-08-05 | 2013-08-05 | A kind of particieboard moisture gradient construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103950085B (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058542A (en) * | 2015-07-31 | 2015-11-18 | 湖北省林业科学研究院 | Vegetable albumen glue shaving board and preparation technology thereof |
| CN107150397A (en) * | 2016-03-02 | 2017-09-12 | 德国迈耶和路德木业技术有限公司 | A kind of manufacture method of short specification framework plate |
| CN107553682A (en) * | 2017-09-26 | 2018-01-09 | 西南林业大学 | A kind of apparatus and method for improving particieboard hot pressing speed |
| CN108000670A (en) * | 2017-12-22 | 2018-05-08 | 万华生态板业(信阳)有限公司 | For manufacturing the glue system and glue applying method of wood-based plate |
| CN108015876A (en) * | 2018-01-29 | 2018-05-11 | 湖南万华生态板业有限公司 | A kind of production method of particieboard |
| CN108115802A (en) * | 2018-01-31 | 2018-06-05 | 湖南万华生态板业有限公司 | A kind of rice husk particieboard |
| CN108214807A (en) * | 2018-01-29 | 2018-06-29 | 湖南万华生态板业有限公司 | A kind of production method of no aldehyde particieboard |
| CN108214806A (en) * | 2018-01-29 | 2018-06-29 | 湖南万华生态板业有限公司 | A kind of glue applying method of no aldehyde particieboard |
| CN108214729A (en) * | 2018-01-23 | 2018-06-29 | 南京林业大学 | A kind of enhanced glued board in surface layer and preparation method |
| CN110103312A (en) * | 2018-02-01 | 2019-08-09 | 寿光市鲁丽木业股份有限公司 | It is a kind of can facing oriented wood chipboard paving process |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103348A (en) * | 1994-05-18 | 1995-06-07 | 博湖县芦苇板厂 | Process for producing reed-shavings board |
| JPH10603A (en) * | 1996-06-18 | 1998-01-06 | Mitsui Petrochem Ind Ltd | Manufacture of neutral woody board |
| JPH1058413A (en) * | 1996-08-21 | 1998-03-03 | Dantani Plywood Co Ltd | Manufacture of particle board |
| JPH1170509A (en) * | 1997-08-29 | 1999-03-16 | Eidai Co Ltd | Preparation of woody board |
| CN1261571A (en) * | 2000-01-28 | 2000-08-02 | 云南省昆明木材厂 | High density homogeneous chipwood and its producing method |
| CN1356202A (en) * | 2001-12-11 | 2002-07-03 | 南京林业大学 | Process for preparing middle-density rice straw board |
| CN1394727A (en) * | 2002-01-31 | 2003-02-05 | 武汉荣德实业有限公司 | Reiforced wood floor base material and its preparation method |
| CN1631632A (en) * | 2004-12-23 | 2005-06-29 | 南京林业大学 | Industrialized production method of wheat straw flakeboard |
| CN101066606A (en) * | 2007-06-14 | 2007-11-07 | 西南林学院 | Process of producing bamboo chipboard |
| CN101092043A (en) * | 2007-07-26 | 2007-12-26 | 信阳木工机械有限责任公司 | Method for fabricating artificial boards |
-
2013
- 2013-08-05 CN CN201310336351.5A patent/CN103950085B/en not_active Expired - Fee Related
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1103348A (en) * | 1994-05-18 | 1995-06-07 | 博湖县芦苇板厂 | Process for producing reed-shavings board |
| JPH10603A (en) * | 1996-06-18 | 1998-01-06 | Mitsui Petrochem Ind Ltd | Manufacture of neutral woody board |
| JPH1058413A (en) * | 1996-08-21 | 1998-03-03 | Dantani Plywood Co Ltd | Manufacture of particle board |
| JPH1170509A (en) * | 1997-08-29 | 1999-03-16 | Eidai Co Ltd | Preparation of woody board |
| CN1261571A (en) * | 2000-01-28 | 2000-08-02 | 云南省昆明木材厂 | High density homogeneous chipwood and its producing method |
| CN1356202A (en) * | 2001-12-11 | 2002-07-03 | 南京林业大学 | Process for preparing middle-density rice straw board |
| CN1394727A (en) * | 2002-01-31 | 2003-02-05 | 武汉荣德实业有限公司 | Reiforced wood floor base material and its preparation method |
| CN1631632A (en) * | 2004-12-23 | 2005-06-29 | 南京林业大学 | Industrialized production method of wheat straw flakeboard |
| CN101066606A (en) * | 2007-06-14 | 2007-11-07 | 西南林学院 | Process of producing bamboo chipboard |
| CN101092043A (en) * | 2007-07-26 | 2007-12-26 | 信阳木工机械有限责任公司 | Method for fabricating artificial boards |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105058542A (en) * | 2015-07-31 | 2015-11-18 | 湖北省林业科学研究院 | Vegetable albumen glue shaving board and preparation technology thereof |
| CN105058542B (en) * | 2015-07-31 | 2017-05-17 | 湖北省林业科学研究院 | Vegetable albumen glue shaving board and preparation technology thereof |
| CN107150397A (en) * | 2016-03-02 | 2017-09-12 | 德国迈耶和路德木业技术有限公司 | A kind of manufacture method of short specification framework plate |
| CN107553682A (en) * | 2017-09-26 | 2018-01-09 | 西南林业大学 | A kind of apparatus and method for improving particieboard hot pressing speed |
| CN108000670A (en) * | 2017-12-22 | 2018-05-08 | 万华生态板业(信阳)有限公司 | For manufacturing the glue system and glue applying method of wood-based plate |
| CN108214729A (en) * | 2018-01-23 | 2018-06-29 | 南京林业大学 | A kind of enhanced glued board in surface layer and preparation method |
| CN108015876A (en) * | 2018-01-29 | 2018-05-11 | 湖南万华生态板业有限公司 | A kind of production method of particieboard |
| CN108214807A (en) * | 2018-01-29 | 2018-06-29 | 湖南万华生态板业有限公司 | A kind of production method of no aldehyde particieboard |
| CN108214806A (en) * | 2018-01-29 | 2018-06-29 | 湖南万华生态板业有限公司 | A kind of glue applying method of no aldehyde particieboard |
| CN108115802A (en) * | 2018-01-31 | 2018-06-05 | 湖南万华生态板业有限公司 | A kind of rice husk particieboard |
| CN110103312A (en) * | 2018-02-01 | 2019-08-09 | 寿光市鲁丽木业股份有限公司 | It is a kind of can facing oriented wood chipboard paving process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103950085B (en) | 2016-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103950085B (en) | A kind of particieboard moisture gradient construction method | |
| CN101066606B (en) | Process of producing bamboo chipboard | |
| CN101125436B (en) | Technology for producing wood wheat straw composite type directional structure board | |
| CN103770187A (en) | Special type oriented strand board and manufacturing process thereof | |
| CN104210009B (en) | A kind of method controlling fiberboard Vertical density gradient | |
| CN105751345A (en) | Method for producing oriented strand board by using eucalyptus waste single board | |
| CN103878858A (en) | Method for manufacturing formaldehyde-free bamboo and wood fiberboard | |
| CN105171883B (en) | A kind of manufacture method of bamboo and wood oriented wood chipboard used for bottom plate of container | |
| CN102248560A (en) | Method for manufacturing plant fiber exterior wall cladding | |
| CN107627695B (en) | Modified PCB resin fibre and the compound oriented shaving essence panel of wood shavings and preparation method thereof | |
| CN101157225B (en) | A method of preparing bamboo glue pattern plate | |
| CN108943210A (en) | A kind of manufacturing method and production line of composite board | |
| CN101279463B (en) | Recombined bamboo plate blank, assembly-forming method thereof and apparatus and recombined bamboo | |
| CN102172948A (en) | Surface infiltrated wood fiber board and production method thereof | |
| CN106239692A (en) | A kind of orientation wood-plastic composite particleboard and manufacture method thereof | |
| CN102555007A (en) | Method for manufacturing modified hard reconstituted timber | |
| CN108818839A (en) | A kind of manufacturing process of the formaldehydeless moisture-proof high density fiberboard of biology base lignin glue | |
| CN102514070A (en) | Manufacturing method of colorized medium density fibreboard | |
| CN102756418B (en) | Method for improving stability of recombinant bamboo wood | |
| CN108839145A (en) | The method for producing novel express delivery box composite board using waste scrap carton | |
| CN209533640U (en) | A kind of production line of composite board | |
| CN203092697U (en) | Environmental-friendly wood shaving board with spots | |
| CN112454599B (en) | Manufacturing process of multifunctional ultrahigh-density plate | |
| CN102086696A (en) | Method for making novel wood-plastic composite building template from waste plastic | |
| CN106272873A (en) | A kind of preparation method of oriented multilayer wood-plastic clad plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160622 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |